Tone mapping output question

[mpavlos]

Hi Andrey! I have a technical question if you don`t mind.
When you use Linear tone mapping, you get full range light/colors in the output exr file. And if you apply exposure in photoshop or nuke, it works properly. No questions here)

But when you use Simple or Advanced for instance, you get your light range clamped in the output exr, but not in the frambuffer. So it work properly in framebuffer! but not in the output file. When you save 32bit exr with a Simple tone mapping, the "white level" is clumped. You don`t get the same exposure result as in the frambuffer.

So is it possible to keep that color depth like in the framebuffer with tone mapping saved in exr? Would be awesome as hell.

[Karba]

"but not in the frambuffer." - here is the mistake.
Frame buffer contains clamped result after tonemapping applied. When you change exposure (or any other tonemapping setting) it is updated from render core buffers.

[mpavlos]

Ok, that`s what i thought. Is there a chance somehow to get full 32bit exr (like you get in Linear) but from Simple tone mapping effect?
I hope you know what i mean. What i`m trying to find is the way how to lower down the overblown areas without changing the overall exposure in post (photoshop or nuke). I want to make n1 to look like n2 in render without loosing the real 32 depth and overall brightness of the light.
Do you have any suggestions/ideas?

[Karba]

Ok, that`s what i thought. Is there a chance somehow to get full 32bit exr (like you get in Linear) but from Simple tone mapping effect?
I hope you know what i mean. What i`m trying to find is the way how to lower down the overblown areas without changing the overall exposure in post (photoshop or nuke). I want to make n1 to look like n2 in render without loosing the real 32 depth and overall brightness of the light.
Do you have any suggestions/ideas?

you have to apply tonemapping in post.

[mpavlos]

Ok, make sense. But how i can apply exactly the same tone mapping settings as in fstorm? If i use exposure and other tools in PS or Nuke, It wont give me the same result as i see in the frambuffer.
Is it possible to make a lut with this settings and use it in AE/Nuke/PS?

[Karba]

If you're composing render elements, it implies you already have some post-processing workflow in place, including tonemapping.
Anyway, you can't get a tonemapped result with unclamped colors. You can't change exposure after tonemapping has been applied.

[Karba]

If you're composing render elements, it implies you already have some post-processing workflow in place, including tonemapping.
Anyway, you can't get a tonemapped result with unclamped colors. You can't change exposure after tonemapping has been applied.